YK10-0015-DI-002-03
19
CAUTION
●This pump adopts an IE3 motor.
●An IE3 motor has achieved efficiency higher than conventional
motors, and its striking current tends to be higher. Due to the
influence, an instantaneous action may occur by the striking current
of the motor // at the selected rating of the present MCCB (molded
case circuit breaker), ELCB (earth leakage circuit breaker), MC
(magnetic contactor), and THR (thermal relay).
●In order to avoid any unnecessary instantaneous action, it is
necessary to take another look at the selection of MCCB, ELCB, and
THR.
For the motor protection (thermal) of PMB-040C and -060C, a
time-lagged type is recommended.
Example: Fuji Electric FA Components & Systems Co., Ltd.
Time-lagged type thermal relay TR-L series
●In order to avoid an excessive decrease in opening and closing life of
the magnetic contactor and fused contacts, it is necessary to take
another look at the selection so that striking current of the motor does
not exceed 10 times the rating (Class AC-3) of the magnetic contactor.
For the striking current of each pump, see "Table 3: Electric capacity
of standard motor and selection criteria for protection circuit."
Fig. 8 Recommended circuit diagram
System you need to prepare
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